The week in pictures: 29 November 2013

British photographer Alex Bradbury, from Leamington Spa, walked over a glacier to reach this waterfall falling through crystal clear ice caves. The hidden caverns of ice appear temporarily at the edge of glaciers, in this case at the south side of Vatnajokull National Park in South-East Iceland. The lack of air in the ice means that it absorbs all visible light, apart from the blue fraction which creates the stunning colours.Picture: ALEX BRADBURY / CATERS NEWS